Princess Aiko, the only child of Crown Prince Naruhito and Crown Princess Masako, turned 13 years old Monday. The Princess, a first-grader at Gakushuin Girls’ Junior High School, developed a fondness for tennis last spring and enjoys playing against her parents on holiday, the ...

On the eve of turning 54 on Sunday, Crown Prince Naruhito praised the vital role the postwar Constitution has played in ensuring peace and prosperity in the country. “Today’s Japan was built with the Japanese Constitution as the cornerstone, and our country is now ...